m68k: compile appropriate mm arch files for ColdFire MMU support

Create a config symbol to enable when using a ColdFire MMU. We then
use that to only compile the necessary arch mm files.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Matt Waddel <mwaddel@yahoo.com>
Acked-by: Kurt Mahan <kmahan@xmission.com>
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 5f860cf..330eb88 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -88,9 +88,12 @@
 config MMU_MOTOROLA
 	bool
 
+config MMU_COLDFIRE
+	bool
+
 config MMU_SUN3
 	bool
-	depends on MMU && !MMU_MOTOROLA
+	depends on MMU && !MMU_MOTOROLA && !MMU_COLDFIRE
 
 menu "Platform setup"